• MESO: Mesoscale Discussion 0049

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sun Jan 25 01:46:33 2026
    ACUS11 KWNS 250146
    SWOMCD
    SPC MCD 250146=20
    TNZ000-MSZ000-MOZ000-ARZ000-LAZ000-250645-

    Mesoscale Discussion 0049
    NWS Storm Prediction Center Norman OK
    0746 PM CST Sat Jan 24 2026

    Areas affected...Northern Louisiana into eastern
    Arkansas...northwest Mississippi...and far western Tennessee

    Concerning...Winter mixed precipitation=20

    Valid 250146Z - 250645Z

    SUMMARY...Another round of freezing rain and sleet is expected to
    spread out of northern Louisiana into eastern Arkansas and northwest Mississippi. Freezing rain rates upwards of 0.05 inch/hour appear
    likely for some locations.

    DISCUSSION...Recent radar mosaics show a developing plume of
    precipitation across central to northern LA - likely associated with strengthening warm advection between 925-850 mb. Over the next
    several hours, an uptick in low-level winds should promote further
    augmentation of isentropic and frontogenetical ascent across the
    lower MS River Valley. Regional 00z RAOBs from SHV and LZK sampled a
    stout (4-12 C) warm layer between 850-700 mb that will melt
    hydrometeors as precipitation spreads north/northeast. Sub-freezing
    surface temperatures will promote some degree of re-freezing near
    the surface, though locations with temperatures at or near/below 15
    F will likely be sufficiently cold (and have a sufficiently deep
    sub-freezing layer) to promote sleet as the predominant
    precipitation type. Warmer locations will likely observe freezing
    rain (with freezing rain rates up to 0.05 inch/hour) with periods of
    sleet possible. Based on latest surface observations, freezing rain
    appears most probable across southeast AR into northwest MS with
    sleet more likely for locations further north into east-central AR
    and far western TN.

    ..Moore.. 01/25/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!40Dljhd-Y1N0vPt_J733Myk562smcwQ8q2ZIY7IdT5S5c_AEasK0WybzleA07esQJgmUkkOGb= oe9dPBZJTF54pv-RYQ$ for graphic product...

    ATTN...WFO...MEG...JAN...LZK...SHV...

    LAT...LON 32499131 32369169 32359227 32459267 32909332 33239345
    33509334 36089071 36279027 36238969 35928916 35648881
    35388867 35128863 34838881 32499131=20


    =3D =3D =3D
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    * Origin: Capitol City Online (1:2320/105)